Develop Reference

How can I move tiles in circularly in a multi-row carousel?

I'm trying to create a tile-like content carousel for a website I'm creating. Basically I need the ordinary content carousel functionality that comes in a lot of different jQuery plug-ins etc. - but instead of the slider being linear, I need the items to shift tiles in a circular manner like this:
Step 1:
Step 2:
Step 3:
I tried creating the setup using Flexbox and some simple jQuery:
$(document).ready(function () {
$(".item").each(function (index) {
$(this).css("order", index);
});
$(".prev").on("click", function () {
// Move all items one order back
$(".item").each(function (index) {
var currentOrder = parseInt($(this).css("order"));
if (currentOrder == undefined) {
currentOrder = index;
}
var newOrder = currentOrder - 1;
if (newOrder < 0) {
newOrder = 5;
}
$(this).css("order", newOrder);
});
});
$(".next").on("click", function () {
// Move all items one order forward
$(".item").each(function (index) {
var currentOrder = parseInt($(this).css("order"));
var newOrder = currentOrder + 1;
if (newOrder > 5) {
newOrder = 0;
}
$(this).css("order", newOrder);
});
});
});
.container {
display: flex;
flex-direction: row;
flex-wrap: wrap;
width: 500px;
}
.item {
width: 125px;
height: 75px;
color: white;
text-align: center;
font-size: 24px;
border: 1px solid white;
padding-top: 50px;
box-sizing: content-box;
background-color: rgb(42, 128, 185);
}
<script src="https://cdnjs.cloudflare.com/ajax/libs/jquery/3.3.1/jquery.min.js"></script>
<button class="prev">Prev</button>
<button class="next">Next</button>
<div class="container">
<div class="item one">1</div>
<div class="item two">2</div>
<div class="item three">3</div>
<div class="item four">4</div>
<div class="item five">5</div>
<div class="item six">6</div>
</div>
but this leaves me with some unresolved issues:
How do I animate the tiles when changing the order (when clicking next/prev)?
How do I fix the order so that the items move in a continuous line instead of wrapping to the start of next line (I'd like the order to be like displayed in step 2 -> 3)?
Any existing plug-in (I've looked but can't find any) or codepen etc. would be very much appreciated as I'm not sure if my approach is maintainable (or even doable).
Thanks a bunch :)

I've used absolute position formula from index to (top, left). Then i've used jQuery to animate that. That's lame but can be improved if that's an issue. It looks nice.
const containerBox = document.querySelector('#container')
let divs = [...containerBox.querySelectorAll('div')]
var size = 100
var margin = 2
function get_top_left(pos) {
if (pos < divs.length / 2) {
return {
left: pos * size + margin * (pos),
top: 0
}
} else {
return {
left: (divs.length - pos - 1) * size + margin * (divs.length - pos - 1),
top: size + margin
}
}
}
var offset = 0
function draw() {
divs.forEach(function(div, index) {
var len = divs.length
index = ((index + offset) % len + len) % len
var pos = get_top_left(index);
//div.style.left = pos.left + "px"
//div.style.top = pos.top + "px"
$(div).animate({
"left": pos.left + "px",
"top": pos.top + "px"
})
})
}
next.onclick = _ => {
offset += 1
draw()
}
prev.onclick = _ => {
offset -= 1
draw()
}
draw();
#container {
display: flex;
flex-direction: row;
flex-wrap: wrap;
width: 500px;
height: 260px;
margin: 10px;
position: relative;
}
#container>div {
width: 100px;
height: 66px;
color: white;
text-align: center;
font-size: 24px;
border: 1px solid white;
padding-top: 34px;
box-sizing: content-box;
background: #2a80b9;
position: absolute;
top: 0;
left: 0;
}
<script src="https://cdnjs.cloudflare.com/ajax/libs/jquery/3.3.1/jquery.min.js"></script>
<button id="prev">Prev</button>
<button id="next">Next</button>
<div id="container">
<div> 1 </div>
<div> 2 </div>
<div> 3 </div>
<div> 4 </div>
<div> 5 </div>
<div> 6 </div>
</div>

This kind of carousel ?
const
containerBox = document.querySelector('#container')
, nextOrder = [3,0,1,4,5,2]
, prevOrder = [1,2,5,0,3,4]
;
next.onclick =_=>
{
let divs = [...containerBox.querySelectorAll('div')]
nextOrder.forEach(n=> containerBox.appendChild( divs[n]) )
}
prev.onclick =_=>
{
let divs = [...containerBox.querySelectorAll('div')]
prevOrder.forEach(n=> containerBox.appendChild( divs[n]) )
}
#container {
display : flex;
flex-direction : row;
flex-wrap : wrap;
width : 500px;
margin : 20px;
}
#container > div {
width : 125px;
height : 75px;
color : white;
text-align : center;
font-size : 24px;
border : 1px solid white;
padding-top : 50px;
box-sizing : content-box;
background : #2a80b9;
}
<button id="prev">Prev</button>
<button id="next">Next</button>
<div id="container">
<div> 1 </div>
<div> 2 </div>
<div> 3 </div>
<div> 6 </div>
<div> 5 </div>
<div> 4 </div>
</div>

ask for making divs draggable and not placed off the screen

I had a hard time coding, so I asked a question here.
If you press the button on the upper left, you can make the color boxes invisible. At the same time, I wrote down the code the the button can make the color boxes could be placed in a random location.
I would like to make sure that the color boxes do not go out of the screen. Even if the width and height were set to 100% on the body, the color box was placed off the screen.
And I want to correct the color boxes so that they can be moved by draggable function, but they don't work together. I would also like to ask for help with this.
and I am not a coding expert man so, I need a comment with coding example.
<!DOCTYPE html>
<html>
<head>
<meta charset="UTF-8">
<style type="text/css">
body {margin:0; padding:0;}
button {position: absolute; width: 30px; height: 30px; background: #edd6bc;}
.random {position: absolute; width: 30px; height: 30px;}
</style>
<script>
</script>
</head>
<body >
<button onclick="showhide()" value="Zeige Features" id="button"></button>
<div style="display: none; background: #6d97b4;" class="random" ></div>
<div style="display: none; background: #c9656f;" class="random" ></div>
<div style="display: none; background: #f1eb40;" class="random" ></div>
<div style="display: none; background: #00825c;" class="random" ></div>
<div style="display: none; background: #009ce0;" class="random" ></div>
<div style="display: none; background: #cee4a6;" class="random" ></div>
<script type="text/javascript">
const btn = document.querySelector("button");
const height = document.documentElement.clientHeight;
const width = document.documentElement.clientWidth;
const boxes = document.querySelectorAll(".random");
btn.addEventListener("click", () => {
Array.from(boxes).forEach(box => {
box.style.top = Math.floor((Math.random() * height) + 1) + "px";
box.style.right = Math.floor((Math.random() * width) + 1) + "px";
})
});
function showhide() {
var x = document.querySelectorAll(".random");
var i;
for (i = 0; i < x.length; i++) {
if (x[i].style.display === "block") {
x[i].style.display = "none";
} else {
x[i].style.display =
"block";
}
}
}
</script>
</body>
</html>

If you want an explanation tell me.
<!DOCTYPE html>
<html>
<head>
<meta charset="UTF-8">
<style type="text/css">
body {margin:0; padding:0;}
button {position: absolute; width: 30px; height: 30px; background: #edd6bc;}
.random {position: absolute; width: 30px; height: 30px;}
</style>
<script>
</script>
</head>
<body >
<button onclick="showhide()" value="Zeige Features" id="button"></button>
<div style="display: none; background: #6d97b4;" class="random"></div>
<div style="display: none; background: #c9656f;" class="random"></div>
<div style="display: none; background: #f1eb40;" class="random"></div>
<div style="display: none; background: #00825c;" class="random"></div>
<div style="display: none; background: #009ce0;" class="random"></div>
<div style="display: none; background: #cee4a6;" class="random"></div>
<script type="text/javascript">
const btn = document.querySelector("button");
const height = document.documentElement.clientHeight - 30;
const width = document.documentElement.clientWidth - 30;
const boxes = document.querySelectorAll(".random");
btn.addEventListener("click", () => {
Array.from(boxes).forEach(box => {
box.style.top = Math.floor(Math.random() * height) + "px";
box.style.left = Math.floor(Math.random() * width) + "px";
})
});
function showhide() {
var x = document.querySelectorAll(".random");
var i;
for (i = 0; i < x.length; i++) {
if (x[i].style.display === "block") {
x[i].style.display = "none";
} else {
x[i].style.display =
"block";
}
}
}
function mouseDown(downEvent) {
var box = downEvent.srcElement;
var offX = box.getBoundingClientRect().left - downEvent.x;
var offY = box.getBoundingClientRect().top - downEvent.y;
document.onmousemove = e => {
box.style.top = Math.min(Math.max(e.y + offY, 0), height) + "px";
box.style.left = Math.min(Math.max(e.x + offX, 0), width) + "px";
}
document.onmouseup = e => {
document.onmousemove = document.onmouseup = null;
}
return false;
}
Array.from(boxes).forEach(box => {
box.onmousedown = mouseDown;
})
</script>
</body>
</html>

While generating the top * right subtract the height and width of the div
const btn = document.querySelector("button");
const height = document.documentElement.clientHeight;
const width = document.documentElement.clientWidth;
const boxes = document.querySelectorAll(".random");
btn.addEventListener("click", () => {
Array.from(boxes).forEach(box => {
const top = Math.floor(Math.random() * (height - 30) + 1) + "px";
const right = Math.floor(Math.random() * (width - 30) + 1) + "px";
box.style.top = top;
box.style.right = right;
})
});
function showhide() {
var x = document.querySelectorAll(".random");
var i;
for (i = 0; i < x.length; i++) {
if (x[i].style.display === "block") {
x[i].style.display = "none";
} else {
x[i].style.display =
"block";
}
}
}
body {
margin: 0;
padding: 0;
}
button {
position: relative;
width: 30px;
height: 30px;
background: #edd6bc;
}
.random {
position: absolute;
width: 30px;
height: 30px;
}
<button onclick="showhide()" value="Zeige Features" id="button"></button>
<div style="display: none; background: #6d97b4;" class="random"></div>
<div style="display: none; background: #c9656f;" class="random"></div>
<div style="display: none; background: #f1eb40;" class="random"></div>
<div style="display: none; background: #00825c;" class="random"></div>
<div style="display: none; background: #009ce0;" class="random"></div>
<div style="display: none; background: #cee4a6;" class="random"></div>

Javascript carosel animation

I'm trying to make an image carousel with center animation. I don't want to use CSS animations, instead I'd like to use jQuery.
By pressing the 'Prev' button the animation will start. One of the slides which will be central begins to grow. I've used jQuery's animate() to animate width and height. Everything works as required except I can't understand why the animation makes the central slide jump.
I have created this sample. If you push the 'Prev' button the animation will start.
var scroll_speed = 4000;
var items_cnt = $('.mg_item').length;
var container_size = $(".main_cnt").innerWidth();
var item_avg_w = container_size / 5;
var item_center_w = ((item_avg_w / 100) * 20) + item_avg_w;
var item_center_h = (item_center_w / 16) * 9 + 30;
var item_w = ((container_size - item_center_w) / 4) - 2;
var item_h = ((item_w / 16) * 9);
var gallery_content = $('.gallery_body').html();
$('.gallery_body').html(gallery_content + gallery_content + gallery_content);
var items_offset = items_cnt * item_w + 14;
$('.gallery_body').css('left', -items_offset);
$('.mg_item').css("width", item_w);
$('.mg_item').css("height", item_h);
//$('.mg_item').css("margin-bottom", (item_center_h - item_h) / 2);
//$('.mg_item').css("margin-top", (item_center_h - item_h) / 2);
//$('.mg_item_с').css("width", item_center_w);
//$('.mg_item_с').css("height", item_center_h);
//document.documentElement.style.setProperty('--center_width', item_center_w + "px");
//document.documentElement.style.setProperty('--center_height', item_center_h + "px");
$('.main_cnt').css("height", item_center_h);
check_visible();
AssignCenter(0);
function gonext() {
AssignCenter(-1);
ZoomIn();
$('.gallery_body').animate({
left: '+=' + (item_w + 2),
}, scroll_speed, "linear", function() {
LoopSlides();
});
}
function goprev() {
AssignCenter(1);
ZoomIn();
$('.gallery_body').animate({
left: '-=' + (item_w + 2),
}, scroll_speed, "linear", function() {
LoopSlides();
});
}
function ZoomIn() {
$('.center').animate({
width: item_center_w + 'px',
height: item_center_h + 'px',
}, scroll_speed, function() {});
}
function LoopSlides() {
var cur_pos = $('.gallery_body').position().left
var left_margin = Math.abs(items_offset * 2 - item_w) * -1;
var right_margin = 0 - item_w;
if (cur_pos < left_margin) {
$('.gallery_body').css('left', -items_offset);
}
if (cur_pos >= 0) {
$('.gallery_body').css('left', -items_offset);
}
check_visible();
AssignCenter(0);
}
function check_visible() {
$('.mg_item').each(function(i, obj) {
var pos = $(this).offset().left;
if (pos < 0 || pos > container_size) {
$(this).addClass("invisible");
$(this).removeClass("active");
} else {
$(this).addClass("active");
$(this).removeClass("invisible");
}
});
}
function AssignCenter(offset) {
var center_slide = $('.active')[2 + offset];
$('.center').each(function(i, obj) {
$(this).removeClass("center");
});
$(center_slide).addClass("center");
//$(center_slide).css("width", item_center_w);
//$(center_slide).css("height", item_center_h);
}
:root {
--center_width: 0px;
--center_height: 0px;
}
.main_cnt {
background-color: rgb(255, 0, 0);
padding: 0px;
overflow: hidden;
margin: 0px;
}
.gallery_body {
width: 500%;
background-color: rgb(128, 128, 128);
position: relative;
}
.mg_item {
width: 198px;
height: 150px;
background-color: blue;
display: inline-block;
position: relative;
margin: -1px;
padding: 0px;
font-size: 120px;
}
.center {
background-color: brown;
/*width: var(--center_width) !important;
height: var(--center_height) !important;*/
}
.item_c {
width: 410px;
height: 150px;
background-color: blueviolet;
display: inline-block;
position: relative;
margin: -1px;
padding: 0px;
font-size: 120px;
}
.video-js .vjs-dock-text {
text-align: right;
}
<script src="https://code.jquery.com/jquery-2.2.0.min.js" type="text/javascript"></script>
<div class="main_cnt">
<div class="gallery_body">
<div class="mg_item">1</div>
<div class="mg_item">2</div>
<div class="mg_item">3</div>
<div class="mg_item">4</div>
<div class="mg_item">5</div>
<div class="mg_item">6</div>
<div class="mg_item">7</div>
</div>
</div>
<br><br>
<button onclick="gonext()">GONEXT</button>
<button onclick="goprev()">GOPREV</button>
<button onclick="check_visible()">CHEVIS</button>

How can i change header on a div when scroll?

I'll create a black and white background website. I want the header to be replaced with translateY when the background is black. I want to change slowly in the transition area. How can i do that?
function headerEffect() {
var win = $(window).scrollTop();
var blackspace = $('.black').offset().top;
var headw = $('.logo-white');
var headb = $('.logo-black');
var where = window.pageYOffset || document.documentElement.scrollTop;
if (win > blackspace) {
headw.css({
'transform': 'translateY(' + (win - blackspace - 42) + 'px' + ')'
});
}
}
headerEffect();
$(window).scroll(headerEffect);
header {
position: fixed;
font-size: 30px;
font-weight: bold;
}
header .logo-white {
color: #fff;
}
header .logo-black {
color: #000;
}
.black {
background: #000;
height: 300px;
width: 100%;
}
.white {
background: #fff;
height: 300px;
width: 100%;
}
<script src="https://ajax.googleapis.com/ajax/libs/jquery/1.9.1/jquery.min.js"></script>
<header>
<div class="logo-black">LOGO</div>
<div class="logo-white">LOGO</div>
</header>
<div class="white"></div>
<div class="black"></div>
<div class="white"></div>
<div class="black"></div>
<div class="white"></div>
<div class="black"></div>
<div class="white"></div>
<div class="black"></div>
<div class="white"></div>
https://jsfiddle.net/br1fmhou/

I write console.log('123') to make sure that you are scroll in black div
function headerEffect() {
var win = $(window).scrollTop();
var blackspace = $('.black').offset().top;
var headw = $('.logo-white');
var headb = $('.logo-black');
var where = window.pageYOffset || document.documentElement.scrollTop;
$('.black').each(function() {
if (win >= ($(this).offset().top - 10) &&
win <= ($(this).offset().top + $(this).height())) {
console.log('123');
headw.css({
'transform': 'translateY('+( win - blackspace - 42) + 'px' +')'
});
}
})
}
https://jsfiddle.net/br1fmhou/2/

Ribbon animation code too repetitive

I spent the last two days getting a ribbon animation to work with divs so that I can later add li link elements to them to act as a menu. I used the progess bar animation code as inspiration from w3schools. The animation works great, only issue is that the code is very un-DRY. I tried to simplify the code by not repeating myself in the CSS and especially not in the javascript but I kept getting closure issues even after using self invoked functions. I would be greatful if anyone can give me some advice or even a solution that will greatly shorten my code to have the same animation effect. I know that I will have several ribbons on the page, each with different number of ribbon layers, so the code as it is can get very complicated very fast. N.B the code below is the working version.
function move1() {
var width = 0;
var elem = document.getElementById("ribbon-part-1");
var id = setInterval(frame, 1);
function frame() {
if (width >= 100) {
clearInterval(id);
} else {
width++;
elem.style.width = width + '%';
}
}
}
function move2() {
var width = 0;
var elem = document.getElementById("ribbon-part-2");
var id = setInterval(frame, 1)
function frame() {
if (width >= 100) {
clearInterval(id);
} else {
width += 2;
elem.style.width = width + '%';
}
}
}
function move3() {
var width = 0;
var elem = document.getElementById("ribbon-part-3");
var id = setInterval(frame, 1)
function frame() {
if (width >= 100) {
clearInterval(id);
} else {
width += 2;
elem.style.width = width + '%';
}
}
}
function move4() {
var width = 0;
var elem = document.getElementById("ribbon-part-4");
var id = setInterval(frame, 1)
function frame() {
if (width >= 100) {
clearInterval(id);
} else {
width += 2;
elem.style.width = width + '%';
}
}
}
function move5() {
var width = 0;
var elem = document.getElementById("end-ribbon");
var id = setInterval(frame, 1)
function frame() {
if (width >= 100) {
clearInterval(id);
} else {
width += 2;
elem.style.width = width + '%';
}
}
}
function move() {
setTimeout(move1, 300);
setTimeout(move2, 600);
setTimeout(move3, 900);
setTimeout(move4, 1200);
setTimeout(move5, 1500);
}
* {
box-sizing: border-box;
}
.front-ribbon {
position: relative;
/*background-color: grey;*/
height: 23px;
width: 160px;
z-index: 1;
transform: skewY(-11deg);
}
.back-ribbon {
position: relative;
/*background-color: grey;*/
height: 23px;
width: 160px;
transform: skewY(4.7deg);
z-index: -1;
}
#ribbon-part-1 {
background-color: rgb(70, 125, 76);
height: 23px;
width: 0%;
}
#ribbon-part-2 {
background-color: rgb(89, 166, 101);
height: 23px;
width: 0%;
}
/*Including the code below will allow for a reverse progressive bar*/
.front-ribbon #ribbon-part-2 {
display: block;
float: right;
}
#ribbon-part-3 {
background-color: rgb(70, 125, 76);
height: 23px;
width: 0%;
}
#ribbon-part-4 {
background-color: rgb(89, 166, 101);
height: 23px;
width: 0%;
}
/*Including the code below will allow for a reverse progressive bar*/
.front-ribbon #ribbon-part-4 {
display: block;
float: right;
}
#end-ribbon {
fill: rgb(70, 125, 76);
width: 0%;
}
<h1>JavaScript ribbon animation</h1>
<div class="back-ribbon">
<div id="ribbon-part-1"></div>
</div>
<div class="front-ribbon">
<div id="ribbon-part-2"></div>
</div>
<div class="back-ribbon">
<div id="ribbon-part-3"></div>
</div>
<div class="front-ribbon">
<div id="ribbon-part-4"></div>
</div>
<svg id="end-ribbon">
<path d="M-6 17 L35 24 L24 10 Z" />
</svg>
<br>
<br>
<br>
<button onclick="move()">Click Me</button>

Perhaps automate the creation of the different ribbons and their styles with DOM manipulation in the JS body, using ReactJS or similar.